When a giant star dies, it can collapse into a black hole or implode into an ultra-dense neutron star. But there are even stranger possibilities. Here are some theorized stars that make black holes look downright boring.
Researchers are on the lookout for a new type of star, one composed of matter that behaves differently from the kind we're familiar with. If these stars exist, they could solve one of the biggest mysteries astrophysicists have confronted.